JP6004826B2 - Distributed power system - Google Patents

Description

  The present invention includes a power line connected to the power system, a charging / discharging device having a power storage unit connected to the power line at a first connection location, a power generation device connected to the power line at a second connection location, A first power consuming device connected to the power line at a third connection point, and the first connection point, the second connection point, and the third connection point toward the downstream side when viewed from the connection point of the power system to the power line. The present invention relates to a distributed power supply system provided in the order of arrangement.

  Patent Document 1 describes a distributed power supply system including a power line connected to an electric power system, and a power generation device, a charge / discharge device, and a power consumption device connected to the power line. In this distributed power system, the power system is connected to the most upstream side of the power line and the power line is connected to the most downstream side of the power line. A consumer device is connected. And the charging / discharging apparatus and the electric power generating apparatus are connected in order from the upstream of the power line toward the downstream. Further, the operation of the power generator is controlled under the condition that the power flow is not directed upstream from the power generator (so-called reverse power flow is prohibited).

  FIG. 5A shows a distributed power supply system having a configuration similar to that of Patent Document 1 shown as a comparative example. The distributed power supply system shown in FIG. 5A includes a power line 2 connected to the power system 1, a charge / discharge device 10 connected to the power line 2 at a first connection location P 1, and a power line 2 connected to the power line 2. A power generation device 11 connected at two connection points P2 and a first power consuming device 12 connected at a third connection point P3 with respect to the power line 2, and downstream from the connection point of the power system 1 with respect to the power line 2 The 1st connection location P1, the 2nd connection location P2, and the 3rd connection location P3 are provided in the arrangement order toward the side. Furthermore, the second power consuming device 13 is connected to the power line 2 at the fourth connection point P4 closer to the power system 1 than the first connection point P1. The power generation device 11 refers to the detection result of the current transformer CT2 (that is, refers to the power that can be derived based on the current value flowing between the first connection point P1 and the second connection point P2 on the power line 2). The maximum generated power is supplied to the power line 2 under the condition that the power flow is not directed toward the power system 1 with respect to the second connection point P2, and the charging / discharging device 10 includes the current transformer CT1. (Ie, referring to the power that can be derived based on the current value on the power system 1 side from the fourth connection point P4), the power system 1 side from the fourth connection point P4 The maximum discharge power is supplied to the power line 2 under the condition that the power flow is not directed to the power line 2.

By configuring as shown in FIG. 5A, if the power system 1 is in a non-power failure state, the first power consuming device 12 is at least one of the power system 1, the charge / discharge device 10, and the power generation device 11. The power can be supplied from one, and the second power consuming device 13 can be supplied from at least one of the power system 1 and the charge / discharge device 10. Further, even when the power system 1 is in a power failure state and the circuit breaker 3 is opened, the first power consuming device 12 is supplied from at least one of the charge / discharge device 10 and the power generation device 11. Can supply power.
Therefore, an important electrical device that needs to stably supply power even during a power failure may be connected to the position of the first power consuming device 12 shown in FIG.

JP 2011-188607 A

  Although the distributed power supply system having the configuration described in FIG. 5A can achieve the purpose of supplying stable power to the first power consuming device 12, for example, the power generating device 11 is more power system than the second connection point P2. Since power cannot be supplied to the 1 side, the generated power of the power generation device 11 cannot be charged into the charge / discharge device 10 or supplied to the second power consumption device 13. Therefore, there is a problem in that the operating rate (the size of the power generation output, the length of the power generation time, etc.) of the power generation device 11 is lowered. As a result, the merit (energy saving property, environmental property, economical efficiency) by operation of the power generation device 11 is limited. In addition, the merit of introducing a power generator that is desired to be operated in such an emergency is limited.

When it aims at making the operation rate of the electric power generating apparatus 11 high, the system structure of the comparative example shown in FIG.5 (b) can be assumed. In the distributed power supply system of FIG. 5B, in the distributed power supply system shown in FIG. 5A, for example, the second power consuming device 13 that is relatively less important and has not been supplied with power during a power failure. In addition, since the electric power is always supplied from the power generation device 11, the operating rate of the power generation device 11 is increased.
However, when the power system 1 is in a power failure state, the power supply from the power system 1 cannot be received, and as a result, the power generation device 11 uses all the power consumption of the first power consumption device 12 and the second power consumption device 13. Since it must be supplied, the power generation device 11 and the charging / discharging device 10 are overloaded, and for example, the power generation device 11 can not perform normal power generation operation.

  Similarly, when the purpose is to increase the operating rate of the power generator 11, a system configuration of a comparative example as shown in FIG. In the distributed power supply system of FIG. 5C, the power generation device 11 refers to the detection result of the current transformer CT2 and is closer to the power system 1 than the first connection point P1 to which the charge / discharge device 10 is connected. Charge / discharge power is controlled under the condition that the power flow is not directed. That is, since the power generated by the power generation device 11 can be charged in the charge / discharge device 10, the operating rate of the power generation device 11 can be increased.

  However, in the distributed power supply system of FIG. 5C, not only the first power consuming device 12 but also the charging / discharging device 10 is connected to the downstream side of the detection location of the current transformer CT2, so the current transformer CT2 The power information that can be derived from the detection result is the sum of the power consumption of the first power consumption device 12 and the charge / discharge power of the charge / discharge device 10. Therefore, when the charge / discharge device 10 is operating in the discharge mode, the charge follow-up speed of the charge / discharge device 10 is generally faster than the load follow-up speed of the power generation device 11, so the charge / discharge device 10 is the main power consumption device. 12 may be supplied with power. In that case, the power generation device 11 only generates the power of the power consumption of the first power consumption device 12 that could not be covered by the charge / discharge device 10. Therefore, the operating rate of the power generation device 11 is reduced as compared with the case where the power generation device 11 controls the generated power to cover all the power consumption of the first power consumption device 12. The load follow-up speed of the charge / discharge device 10 is faster than the load follow-up speed of the power generation device 11, while the charge / discharge device 10 only needs to change the power output. This is because there is a time difference between the change and the actual output change.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a distributed power supply system capable of avoiding overloading of the power generation device and the charge / discharge device while increasing the operating rate of the power generation device. It is in.

The characteristic configuration of the distributed power supply system according to the present invention for achieving the above object includes: a power line connected to a power system; and a charge / discharge device having a power storage unit connected to the power line at a first connection location; A power generator connected to the power line at a second connection location, and a first power consuming device connected to the power line at a third connection location, from the connection location of the power system to the power line. A distributed power supply system in which the first connection location, the second connection location, and the third connection location are provided in the arrangement order toward the downstream side as viewed,
The charge / discharge device operates by switching between a discharge mode capable of discharging the power stored in the power storage unit to the power line and a charge mode capable of charging power from the power line to the power storage unit,
The power generator is configured such that when the charge / discharge device is in the charge mode, the power flow in the power line is not directed from the predetermined location on the power system side to the power system side than the first connection location. The generated power is controlled by the control unit, and when the charging / discharging device is in the discharge mode, the generated power is controlled under the condition that the power flow in the power line is not directed from the second connection point to the power system side. Configured ,
The charging / discharging device transmits a mode state signal indicating whether the discharging mode or the charging mode is to the power generation device,
The power generation device receives a first signal representing a power flow from the first connection location toward the power system and a second signal representing a power flow from the second connection location toward the power system, When it is determined that the charging / discharging device is in the charging mode based on the mode state signal received from the charging / discharging device, the generated power is controlled with reference to the first signal and determined to be in the discharging mode. In some cases, the generated power is controlled with reference to the second signal .

  According to the above characteristic configuration, the power generation device is configured such that when the charging / discharging device is in the charging mode, the power flow in the power line is not directed from the predetermined location on the power system side to the power system side from the first connection location. To control the generated power. That is, the charging / discharging device and the first electric power connected to the power line in the range including the first connection location and the downstream side thereof, that is, in the range including the first connection location and further away from the power system. The consumption power can be supplied to the consuming device. Thus, the operation rate of the power generator can be increased by operating the power generator to charge the charge / discharge device. In addition, when the generated power of the power generator cannot be charged to the charge / discharge device, the power supplied to the power system from a thermal power plant or the like whose power generation efficiency (that is, energy efficiency) is not so high is charged to the charge / discharge device. The power must be discharged and supplied to the power consuming device. In other words, the operating rate of the power generation device is relatively low, and the charging / discharging device is apparently operated with low energy efficiency (that is, power generation efficiency (about 37%) of the thermal power plant × charge efficiency × discharge efficiency). Have to do. On the other hand, if the charge / discharge device can be charged with the power generated by the power generation device, the operating rate of the power generation device can be improved, and for example, a heat and power cogeneration device that generates heat and electricity together is used as the power generation device. In some cases, the energy efficiency is about 90% (power generation efficiency (about 35%) + exhaust heat efficiency (about 55%)), so the charge / discharge device also appears to have a high energy efficiency (the power generation efficiency of the combined heat and power unit (about 35%) × charge efficiency × discharge efficiency + exhaust heat efficiency (about 55%) of the combined heat and power device.

In addition, when the charging / discharging device is in the discharge mode, the power generation device controls the generated power under the condition that the power flow in the power line is not directed from the second connection location to the power system side. In other words, to the first power consuming device connected to the power line in the range including the second connection point and further downstream than that, that is, in the range including the second connection point and further away from the power system. The power generated by the power generator can be supplied. Further, since the charging / discharging device is not connected to the power line in the downstream side including the second connection location, even if the charging / discharging device is in the discharge mode, the power generation device is not connected to the first power consumption. It operates so as to grasp the power consumption of the device and output the generated power to cover the power consumption. As a result, it is possible to avoid the problem that the operating rate of the power generation device is reduced due to the discharge of the charge / discharge device.
Further, the mode state signal only needs to be able to distinguish between the two states of the charging mode and the discharging mode by the power generation apparatus that has received the mode state signal. For example, a simple combination of an HI (high) signal and an LO (low) signal can be used. Whether the charging / discharging device is in the charging mode or the discharging mode can be transmitted from the charging / discharging device to the power generation device using the signal. In addition, the power generation device refers to the first signal based on whether the charging / discharging device is in the charging mode or the discharging mode, and determines the power flow in the power line from the first connection location to a predetermined power system side. The generated power is controlled under the condition that it does not go from the location to the power system side, or the condition that the power flow in the power line is not directed from the second connection location to the power system side with reference to the second signal It is possible to voluntarily switch whether to control the generated power.
Therefore, it is possible to provide a distributed power supply system that can avoid overloading of the power generation device and the charge / discharge device while increasing the operating rate of the power generation device.

Another characteristic configuration of the distributed power supply system according to the present invention includes: a power line connected to a power system; a charge / discharge device having a power storage unit connected to the power line at a first connection location; and the power line. Power generator connected at the second connection location and a first power consuming device connected at the third connection location to the power line, and downstream from the connection location of the power system to the power line A distributed power supply system in which the first connection location, the second connection location, and the third connection location are provided in the order of arrangement,
The charge / discharge device operates by switching between a discharge mode capable of discharging the power stored in the power storage unit to the power line and a charge mode capable of charging power from the power line to the power storage unit,
The power generator is configured such that when the charge / discharge device is in the charge mode, the power flow in the power line is not directed from the predetermined location on the power system side to the power system side than the first connection location. The generated power is controlled by the control unit, and when the charging / discharging device is in the discharge mode, the generated power is controlled under the condition that the power flow in the power line is not directed from the second connection point to the power system side. Configured,
A first signal line to which a first signal representing a power flow from the first connection point toward the power system side is input, and a second signal representing a power flow from the second connection point toward the power system side. A switch to which a second signal line to which a signal is input is connected; a first switching state in which the first signal line is connected to the power generator; and a second switch in which the second signal line is connected to the power generator. A switching device having a switching control unit that switches the switch to any of the states,
The switching control unit receives a mode state signal indicating whether the charging mode is the discharging mode or the charging mode from the charging / discharging device, and when the charging / discharging device is in the charging mode, Switching to the first switching state and switching the switch to the second switching state when the charging / discharging device is in the discharge mode.

According to the above characteristic configuration, the power generation device is configured such that when the charging / discharging device is in the charging mode, the power flow in the power line is not directed from the predetermined location on the power system side to the power system side from the first connection location. To control the generated power. That is, the charging / discharging device and the first electric power connected to the power line in the range including the first connection location and the downstream side thereof, that is, in the range including the first connection location and further away from the power system. The consumption power can be supplied to the consuming device. Thus, the operation rate of the power generator can be increased by operating the power generator to charge the charge / discharge device. In addition, when the generated power of the power generator cannot be charged to the charge / discharge device, the power supplied to the power system from a thermal power plant or the like whose power generation efficiency (that is, energy efficiency) is not so high is charged to the charge / discharge device. The power must be discharged and supplied to the power consuming device. In other words, the operating rate of the power generation device is relatively low, and the charging / discharging device is apparently operated with low energy efficiency (that is, power generation efficiency (about 37%) of the thermal power plant × charge efficiency × discharge efficiency). Have to do. On the other hand, if the charge / discharge device can be charged with the power generated by the power generation device, the operating rate of the power generation device can be improved, and for example, a heat and power cogeneration device that generates heat and electricity together is used as the power generation device. In some cases, the energy efficiency is about 90% (power generation efficiency (about 35%) + exhaust heat efficiency (about 55%)), so the charge / discharge device also appears to have a high energy efficiency (the power generation efficiency of the combined heat and power unit (about 35%) × charge efficiency × discharge efficiency + exhaust heat efficiency (about 55%) of the combined heat and power device.

In addition, when the charging / discharging device is in the discharge mode, the power generation device controls the generated power under the condition that the power flow in the power line is not directed from the second connection location to the power system side. In other words, to the first power consuming device connected to the power line in the range including the second connection point and further downstream than that, that is, in the range including the second connection point and further away from the power system. The power generated by the power generator can be supplied. Further, since the charging / discharging device is not connected to the power line in the downstream side including the second connection location, even if the charging / discharging device is in the discharge mode, the power generation device is not connected to the first power consumption. It operates so as to grasp the power consumption of the device and output the generated power to cover the power consumption. As a result, it is possible to avoid the problem that the operating rate of the power generation device is reduced due to the discharge of the charge / discharge device.
  The switching device switches whether the first signal or the second signal is transmitted to the power generation device based on whether the charging / discharging device is in the charging mode or the discharging mode. That is, the power generation device automatically determines the power flow in the power line when the charge / discharge device is in the charge mode automatically without determining whether the charge / discharge device is in the charge mode or the discharge mode. The generated power is controlled under the condition that it does not go from the predetermined location on the power system side to the power system side rather than the connection location, and when the charge / discharge device is in the discharge mode, the power flow in the power line is transmitted from the second connection location. It operates to control the generated power under the condition that it does not go to the grid side.
Therefore, it is possible to provide a distributed power supply system that can avoid overloading of the power generation device and the charge / discharge device while increasing the operating rate of the power generation device.

Still another characteristic configuration of the distributed power supply system according to the present invention includes a system information detection device that detects system information capable of determining whether the power system is in a power outage state or a non-power outage state,
The charging / discharging device is configured to operate in the discharge mode when it is determined that the power system is in a power failure state based on the system information received from the system information detection device,
The power generator is in the point of determining that the charge / discharge device is in the discharge mode when it is determined that the power system is in a power failure state based on the system information received from the system information detection device.

According to the above characteristic configuration, since the charging / discharging device operates in the discharge mode when the power system is in a power failure state, the power supply from the power system is stopped, but the generated power of the power generating device and the discharging power of the charging / discharging device are reduced. It can be used to supply power to the first power consuming device.
In addition, even if the power generation device does not receive information indicating whether the charge / discharge device is operating in the charge mode or the discharge mode, the power system is in a power failure state based on information received from the system information detection device. When determined, it can be determined that the charge / discharge device is in the discharge mode.

Still another characteristic configuration of the distributed power supply system according to the present invention is the second power consuming device connected to the power line at a fourth connection location provided on the power system side with respect to the second connection location. Prepared,
Based on the grid information received from the grid information detection apparatus, the power generation device directs the power flow in the power line to the power grid side from the second connection location when the power grid is in a power failure state. The generated power is controlled under the condition that the power system is not switched, and when the power system is in an uninterruptible state, the power flow in the power line is more on the power system side than the predetermined place on the power system side than the fourth connection place. Configured to control the generated power under the condition that
When the power system is in a power failure state, the charge / discharge device, the power generation device, and the first power consumption device are electrically connected to each other via the power line, and the second power consumption device is Electrically disconnected from the discharge device, the power generation device and the first power consuming device;
When the power system is in a non-power failure state, the charge / discharge device, the power generation device, the first power consumption device, and the second power consumption device are electrically connected to each other via the power line. .

According to the above characteristic configuration, when the power system is in a non-power failure state, the charge / discharge device, the power generation device, the first power consumption device, and the second power consumption device are electrically connected to each other via the power line. The first power consuming device can be supplied with power from at least one of the power system, the charging / discharging device, and the power generating device, and the second power consuming device can be supplied from only the power system or the power system and charging / discharging. Power can be supplied from at least one of the devices.
In addition, when the power system is in a power failure state, the charging / discharging device, the power generation device, and the first power consuming device are electrically connected to each other via the power line. The power can be supplied from at least one of the power generation device. That is, since it is only necessary to share the power consumption of the first power consuming device between the charging / discharging device and the power generation device, it is possible to avoid overloading the charging / discharging device and the power generation device.

  In addition, even if it is necessary to supply power from the charging / discharging device to the second power consuming device when the power system is in a non-power failure state, the second power consuming device is used when the power system is in a power failure state. Is electrically disconnected from the charging / discharging device, and power supply from the charging / discharging device to the second power consuming device becomes unnecessary. As a result, when the power system is in a power failure state, the load on the charging / discharging device can be reduced, and power can be supplied for a relatively long time from the charging / discharging device to the first power consuming device. .

Still another characteristic configuration of the distributed power supply system according to the present invention includes a power line connected to a power system, a charge / discharge device having a power storage unit connected to the power line at a first connection location, and the power line. A power generator connected at a second connection location and a first power consuming device connected at a third connection location to the power line, the downstream side as seen from the connection location of the power system to the power line A distributed power supply system in which the first connection location, the third connection location, and the second connection location are provided in the arrangement order toward the
The charge / discharge device operates by switching between a discharge mode capable of discharging the power stored in the power storage unit to the power line and a charge mode capable of charging power from the power line to the power storage unit,
The power generator is configured such that when the charge / discharge device is in the charge mode, the power flow in the power line is not directed from the predetermined location on the power system side to the power system side than the first connection location. The generated power is controlled by the control unit, and when the charging / discharging device is in the discharge mode, the generated power is controlled under the condition that the power flow in the power line is not directed from the third connection point to the power system side. Configured,
The charging / discharging device transmits a mode state signal indicating whether the discharging mode or the charging mode is to the power generation device,
The power generation device receives a first signal representing a power flow from the first connection location toward the power system and a second signal representing a power flow from the third connection location toward the power system, When it is determined that the charging / discharging device is in the charging mode based on the mode state signal received from the charging / discharging device, the generated power is controlled with reference to the first signal and determined to be in the discharging mode. In some cases, the generated power is controlled with reference to the second signal.

According to the above characteristic configuration, the power generation device is configured such that when the charging / discharging device is in the charging mode, the power flow in the power line is not directed from the predetermined location on the power system side to the power system side from the first connection location. To control the generated power. That is, the charging / discharging device and the first electric power connected to the power line in the range including the first connection location and the downstream side thereof, that is, in the range including the first connection location and further away from the power system. The consumption power can be supplied to the consuming device. Thus, the operation rate of the power generator can be increased by operating the power generator to charge the charge / discharge device. In addition, when the generated power of the power generator cannot be charged to the charge / discharge device, the power supplied to the power system from a thermal power plant or the like whose power generation efficiency (that is, energy efficiency) is not so high is charged to the charge / discharge device. The power must be discharged and supplied to the power consuming device. In other words, the operating rate of the power generation device is relatively low, and the charging / discharging device is apparently operated with low energy efficiency (that is, power generation efficiency (about 37%) of the thermal power plant × charge efficiency × discharge efficiency). Have to do. On the other hand, if the charge / discharge device can be charged with the power generated by the power generation device, the operating rate of the power generation device can be improved, and for example, a heat and power cogeneration device that generates heat and electricity together is used as the power generation device. In some cases, the energy efficiency is about 90% (power generation efficiency (about 35%) + exhaust heat efficiency (about 55%)), so the charge / discharge device also appears to have a high energy efficiency (the power generation efficiency of the combined heat and power unit (about 35%) × charge efficiency × discharge efficiency + exhaust heat efficiency (about 55%) of the combined heat and power device.

In addition, when the charging / discharging device is in the discharge mode, the power generation device controls the generated power under the condition that the power flow in the power line is not directed from the third connection location to the power system side. That is, to the first power consuming device connected to the power line in the range including the third connection point and further downstream than that, that is, in the range including the third connection point and further away from the power system. The power generated by the power generator can be supplied. Furthermore, since the charging / discharging device is not connected to the power line in the downstream side including the third connection location, even if the charging / discharging device is in the discharge mode, the power generation device can It operates so as to grasp the power consumption of the device and output the generated power to cover the power consumption. As a result, it is possible to avoid the problem that the operating rate of the power generation device is reduced due to the discharge of the charge / discharge device.
Further, the mode state signal only needs to be able to distinguish between the two states of the charging mode and the discharging mode by the power generation apparatus that has received the mode state signal. For example, a simple combination of an HI (high) signal and an LO (low) signal can be used. Whether the charging / discharging device is in the charging mode or the discharging mode can be transmitted from the charging / discharging device to the power generation device using the signal. In addition, the power generation device refers to the first signal based on whether the charging / discharging device is in the charging mode or the discharging mode, and determines the power flow in the power line from the first connection location to a predetermined power system side. The generated power is controlled under the condition that it is not directed from the location to the power system side, or the power flow in the power line is not directed from the third connection location to the power system side with reference to the second signal. It is possible to voluntarily switch whether to control the generated power.
Therefore, it is possible to provide a distributed power supply system that can avoid overloading of the power generation device and the charge / discharge device while increasing the operating rate of the power generation device.

Still another characteristic configuration of the distributed power supply system according to the present invention includes a power line connected to a power system, a charge / discharge device having a power storage unit connected to the power line at a first connection location, and the power line. A power generator connected at a second connection location and a first power consuming device connected at a third connection location to the power line, the downstream side as seen from the connection location of the power system to the power line A distributed power supply system in which the first connection location, the third connection location, and the second connection location are provided in the arrangement order toward the
The charge / discharge device operates by switching between a discharge mode capable of discharging the power stored in the power storage unit to the power line and a charge mode capable of charging power from the power line to the power storage unit,
The power generator is configured such that when the charge / discharge device is in the charge mode, the power flow in the power line is not directed from the predetermined location on the power system side to the power system side than the first connection location. The generated power is controlled by the control unit, and when the charging / discharging device is in the discharge mode, the generated power is controlled under the condition that the power flow in the power line is not directed from the third connection point to the power system side. Configured,
A first signal line to which a first signal representing a power flow from the first connection point toward the power system side is input, and a second signal representing a power flow from the third connection point toward the power system side. A switch to which a second signal line to which a signal is input is connected; a first switching state in which the first signal line is connected to the power generator; and a second switch in which the second signal line is connected to the power generator. A switching device having a switching control unit that switches the switch to any of the states,
The switching control unit receives a mode state signal indicating whether the charging mode is the discharging mode or the charging mode from the charging / discharging device, and when the charging / discharging device is in the charging mode, Switching to the first switching state and switching the switch to the second switching state when the charging / discharging device is in the discharge mode.

According to the above characteristic configuration, the power generation device is configured such that when the charging / discharging device is in the charging mode, the power flow in the power line is not directed from the predetermined location on the power system side to the power system side from the first connection location. To control the generated power. That is, the charging / discharging device and the first electric power connected to the power line in the range including the first connection location and the downstream side thereof, that is, in the range including the first connection location and further away from the power system. The consumption power can be supplied to the consuming device. Thus, the operation rate of the power generator can be increased by operating the power generator to charge the charge / discharge device. In addition, when the generated power of the power generator cannot be charged to the charge / discharge device, the power supplied to the power system from a thermal power plant or the like whose power generation efficiency (that is, energy efficiency) is not so high is charged to the charge / discharge device. The power must be discharged and supplied to the power consuming device. In other words, the operating rate of the power generation device is relatively low, and the charging / discharging device is apparently operated with low energy efficiency (that is, power generation efficiency (about 37%) of the thermal power plant × charge efficiency × discharge efficiency). Have to do. On the other hand, if the charge / discharge device can be charged with the power generated by the power generation device, the operating rate of the power generation device can be improved, and for example, a heat and power cogeneration device that generates heat and electricity together is used as the power generation device. In some cases, the energy efficiency is about 90% (power generation efficiency (about 35%) + exhaust heat efficiency (about 55%)), so the charge / discharge device also appears to have a high energy efficiency (the power generation efficiency of the combined heat and power unit (about 35%) × charge efficiency × discharge efficiency + exhaust heat efficiency (about 55%) of the combined heat and power device.

In addition, when the charging / discharging device is in the discharge mode, the power generation device controls the generated power under the condition that the power flow in the power line is not directed from the third connection location to the power system side. That is, to the first power consuming device connected to the power line in the range including the third connection point and further downstream than that, that is, in the range including the third connection point and further away from the power system. The power generated by the power generator can be supplied. Furthermore, since the charging / discharging device is not connected to the power line in the downstream side including the third connection location, even if the charging / discharging device is in the discharge mode, the power generation device can It operates so as to grasp the power consumption of the device and output the generated power to cover the power consumption. As a result, it is possible to avoid the problem that the operating rate of the power generation device is reduced due to the discharge of the charge / discharge device.
The switching device switches whether the first signal or the second signal is transmitted to the power generation device based on whether the charging / discharging device is in the charging mode or the discharging mode. That is, the power generation device automatically determines the power flow in the power line when the charge / discharge device is in the charge mode automatically without determining whether the charge / discharge device is in the charge mode or the discharge mode. The generated power is controlled under the condition that it does not go from the predetermined location on the power system side to the power system side rather than the connection location, and when the charge / discharge device is in the discharge mode, the power flow in the power line starts from the third connection location. It operates to control the generated power under the condition that it does not go to the grid side.
Therefore, it is possible to provide a distributed power supply system that can avoid overloading of the power generation device and the charge / discharge device while increasing the operating rate of the power generation device.

Still another characteristic configuration of the distributed power supply system according to the present invention includes a system information detection device that detects system information capable of determining whether the power system is in a power outage state or a non-power outage state,
The charging / discharging device is configured to operate in the discharge mode when it is determined that the power system is in a power failure state based on the system information received from the system information detection device,
The power generator is in the point of determining that the charge / discharge device is in the discharge mode when it is determined that the power system is in a power failure state based on the system information received from the system information detection device.

According to the above characteristic configuration, since the charging / discharging device operates in the discharge mode when the power system is in a power failure state, the power supply from the power system is stopped, but the generated power of the power generating device and the discharging power of the charging / discharging device are reduced. It can be used to supply power to the first power consuming device.
In addition, even if the power generation device does not receive information indicating whether the charge / discharge device is operating in the charge mode or the discharge mode, the power system is in a power failure state based on information received from the system information detection device. When determined, it can be determined that the charge / discharge device is in the discharge mode.

Still another characteristic configuration of the distributed power supply system according to the present invention is the second power consuming device connected to the power line at a fourth connection location provided on the power system side with respect to the third connection location. Prepared,
Based on the grid information received from the grid information detection apparatus, the power generation device directs the power flow in the power line to the power grid side from the third connection location when the power grid is in a power failure state. The generated power is controlled under the condition that the power system is not switched, and when the power system is in an uninterruptible state, the power flow in the power line is more on the power system side than the predetermined place on the power system side than the fourth connection place. Configured to control the generated power under the condition that
When the power system is in a power failure state, the charge / discharge device, the power generation device, and the first power consumption device are electrically connected to each other via the power line, and the second power consumption device is Electrically disconnected from the discharge device, the power generation device and the first power consuming device;
When the power system is in a non-power failure state, the charge / discharge device, the power generation device, the first power consumption device, and the second power consumption device are electrically connected to each other via the power line. .

According to the above characteristic configuration, when the power system is in a non-power failure state, the charge / discharge device, the power generation device, the first power consumption device, and the second power consumption device are electrically connected to each other via the power line. The first power consuming device can be supplied with power from at least one of the power system, the charging / discharging device, and the power generating device, and the second power consuming device can be supplied from only the power system or the power system and charging / discharging Power can be supplied from at least one of the devices.
In addition, when the power system is in a power failure state, the charging / discharging device, the power generation device, and the first power consuming device are electrically connected to each other via the power line. The power can be supplied from at least one of the power generation device. That is, since it is only necessary to share the power consumption of the first power consuming device between the charging / discharging device and the power generation device, it is possible to avoid overloading the charging / discharging device and the power generation device.

In addition, even if it is necessary to supply power from the charging / discharging device to the second power consuming device when the power system is in a non-power failure state, the second power consuming device is used when the power system is in a power failure state. Is electrically disconnected from the charging / discharging device, and power supply from the charging / discharging device to the second power consuming device becomes unnecessary. As a result, when the power system is in a power failure state, the load on the charging / discharging device can be reduced, and power can be supplied for a relatively long time from the charging / discharging device to the first power consuming device. .

It is a figure explaining the structure of the distributed power supply system of 1st Embodiment. It is a figure explaining the structure of the distributed power supply system of 2nd Embodiment. It is a figure explaining the structure of the distributed power supply system of 3rd Embodiment. It is a figure explaining the structure of the distributed power supply system of 4th Embodiment. It is a figure explaining the structure of the distributed power supply system of a comparative example. It is a figure explaining the structure of the distributed power supply system of 5th Embodiment. It is a figure explaining the structure of the distributed power supply system of 6th Embodiment. It is a figure explaining the structure of the distributed power supply system of 7th Embodiment. It is a figure explaining the structure of the distributed power supply system of 8th Embodiment.

<First Embodiment>
The distributed power supply system according to the first embodiment will be described below with reference to the drawings.
FIG. 1 is a diagram illustrating the configuration of the distributed power supply system according to the first embodiment. As shown in FIG. 1, the distributed power supply system includes a power line 2 connected to the power system 1, a charging / discharging device 10 having a power storage unit 10 b connected to the power line 2 at a first connection location P 1, and a power line 2 is connected to the power line 2 at the second connection point P2 and the first power consuming device 12 is connected to the power line 2 at the third connection point P3. A first connection point P1, a second connection point P2, and a third connection point P3 are provided in the arrangement order toward the downstream side as viewed from the point. Furthermore, the second power consuming device 13 is connected to the power line 2 at the fourth connection point P4 closer to the power system 1 than the first connection point P1. In the present embodiment, the side closer to the power system 1 in the power line 2 is referred to as the upstream side, and the side away from the power system 1 in the power line 2 is referred to as the downstream side.

  In this embodiment, the circuit breaker 3 is provided in the power line 2 on the power system 1 side from the first connection point P1. Moreover, the system information detection apparatus 15 which detects the system information which can determine whether the electric power system 1 is in the power failure state or the non-power failure state is provided on the power system 1 side from the circuit breaker 3. For example, the system information detection device 15 is a device that detects the voltage of power on the power line 2 as system information. In this case, if the voltage of the power line 2 on the power system 1 side of the circuit breaker 3 is less than a predetermined voltage, it can be determined that the power system 1 is in a power failure state, and if the voltage is higher than the predetermined voltage, the power system 1 is in a non-power failure state. Can be determined.

  The circuit breaker 3 refers to the detection result of the system information detection device 15, and if the power system 1 is in a non-power failure state, the circuit breaker 3 is closed to electrically connect the power system 1 and the first connection location P1. Thus, the power supplied from the power system 1 is supplied to the downstream side of the first connection point P1. Moreover, the circuit breaker 3 refers to the detection result of the system information detection device 15, and if the power system 1 is in a power failure state, the circuit breaker 3 is opened to electrically disconnect the power system 1 and the first connection location P1. .

  The charging / discharging device 10 includes a power storage unit 10b capable of storing electricity, and a power conversion unit 10a capable of controlling discharge power from the power storage unit 10b to the power line 2 and charge power from the power line 2 to the power storage unit 10b. . The power storage unit 10b can be composed of various devices having a power storage function, such as a storage battery or an electric double layer capacitor. Moreover, the detection result of the system | strain information detection apparatus 15 is comprised so that it may be transmitted to the charging / discharging apparatus 10. FIG.

  In the present embodiment, the first signal to the third signal, which are detection results of the current transformers CT1 to CT3, are current values in the power line 2. As a result, the power in the power line 2 can be derived from the detection results of the current transformers CT1 to CT3 and the voltage value of the power line 2 detected separately. Specifically, the power generation device 11 knows the power flow from the first connection point P1 toward the power system 1 from the first signal that is the detection result of the current transformer CT1 and the voltage value of the power of the power line 2. In addition, the power flow from the second connection point P2 toward the power system 1 can be known from the second signal, which is the detection result of the current transformer CT2, and the voltage value of the power of the power line 2. Similarly, the charging / discharging device 10 knows the power flow from the fourth connection point P4 toward the power system 1 from the third signal, which is the detection result of the current transformer CT3, and the voltage value of the power of the power line 2. Can do.

  The power conversion unit 10a of the charging / discharging device 10 refers to the detection result of the system information detection device 15 when the power system 1 is in a non-power failure state (that is, the power supply from the power system 1 is normally performed). ) With reference to the detection result of the current transformer CT3 provided on the power line 2 on the power system 1 side with respect to the second power consuming device 13, the power line 2 on the power system 1 side with respect to the fourth connection point P4. Charge / discharge power is controlled under the condition that the power flow is not directed. That is, when the power conversion unit 10a of the charging / discharging device 10 operates in the discharge mode, the maximum discharge is performed under the condition that the power flow in the power line 2 is not directed to the power system 1 side than the fourth connection point P4. Electric power is supplied to the power line 2.

Based on the system information transmitted from the system information detection device 15, the charging / discharging device 10 can determine whether the power system 1 is in a non-power failure state or a power failure state. And the charging / discharging apparatus 10 discharges with respect to the power line 2 the charge mode which can charge the electrical storage part 10b with the electric power from the power line 2, and the electric power stored in the electrical storage part 10b, when the electric power grid | system 1 is a non-power failure state. Operate in any of the possible discharge modes. The charging / discharging device 10 may stand by without performing a charging operation even in the charging mode, or may be waiting without performing a discharging operation even in the discharging mode (standby state). .
On the other hand, the charging / discharging device 10 always operates in the discharge mode when the power system 1 is in a power failure state (that is, when the power supply from the power system 1 is not normally performed).

  The charging / discharging device 10 transmits a mode state signal indicating whether the charging mode is the discharging mode or the charging mode to the power generation device 11. In the present embodiment, the mode state signal only needs to be able to distinguish between the two states of the charge mode and the discharge mode. Therefore, the mode state signal is a combination of the HI (high) signal and the LO (low) signal having different voltage values. Can be configured. The charging / discharging device 10 may output, for example, an HI signal when in the discharging mode, and an LO signal when in the charging mode. Further, the power generation device 11 voluntarily determines whether the charge / discharge device 10 is in the discharge mode or the charge mode based on the mode state signal (HI signal and LO signal) transmitted from the charge / discharge device 10. To do.

Since the circuit breaker 3 is closed when the power system 1 is in an uninterrupted state, the charging / discharging device 10, the power generation device 11, the first power consumption device 12, and the second power consumption device 13 are mutually connected via the power line 2. Electrically connected. At this time, power is supplied from at least one of the power system 1, the charge / discharge device 10, and the power generation device 11 to the first power consumption device 12, and power is supplied to the second power consumption device 13. Power is supplied from at least one of the system 1 and the charge / discharge device 10.
On the other hand, since the circuit breaker 3 opens when the power system 1 is in a power failure state, the charge / discharge device 10, the power generation device 11, and the first power consumption device 12 are electrically connected to each other via the power line 2. In addition, the second power consuming device 13 is electrically disconnected from the charge / discharge device 10, the power generation device 11, and the first power consuming device 12. At this time, power is supplied from at least one of the charging / discharging device 10 and the power generation device 11 to the first power consumption device 12, but no power is supplied to the second power consumption device 13. .

The first power consuming device 12 is an important electrical device that needs to supply power even when the power system 1 is in a power failure state. For example, a lighting device that needs to be lit in an emergency such as a power outage or an information device that needs to be constantly operated is connected to the third connection point P3 of the power line 2 as the first power consuming device 12. . On the other hand, the second power consuming device 13 is an electrical device that is not supplied with power if the power system 1 is in a power failure state. For example, an electric device that is less important than the first power consuming device 12 such as an air conditioner that does not have to be supplied with power in an emergency such as a power outage or a lighting device that is not so important is the second power. The consumer device 13 is connected to the fourth connection point P4 of the power line 2.
In addition, it can be set suitably what kind of electric equipment is made into the 1st power consuming apparatus 12 and the 2nd power consuming apparatus 13. FIG.

  The power generation device 11 can be configured using a device capable of controlling its own generated power, such as a fuel cell or a generator that operates by the driving force of the engine. The power generation device 11 is such that when the charging / discharging device 10 is in the charging mode, the power flow in the power line 2 is not directed from the predetermined location on the power system 1 side to the power system 1 side than the first connection location P1. The generated power is controlled below (that is, the maximum generated power is supplied to the power line 2 under the conditions), and when the charging / discharging device 10 is in the discharge mode, the power flow in the power line 2 is changed from the second connection point P2. The generated power is controlled under the condition that it does not go to the power system 1 side (that is, the maximum generated power is supplied to the power line 2 under that condition).

  Specifically, when the charging / discharging device 10 is in the charging mode, the power generation device 11 refers to the detection result (first signal) of the current transformer CT1 to change the power flow in the power line 2 to the first connection location P1. The generated power is controlled under the condition that it is not directed from the predetermined location on the power system 1 side to the power system 1 side. As a result, the power corresponding to the total power of the charging power of the charging / discharging device 10 and the power consumption of the first power consuming device 12 or the power equal to or lower than the total power is supplied from the power generator 11 to the power line 2.

  On the other hand, when the charging / discharging device 10 is in the discharge mode, the power generation device 11 refers to the detection result (second signal) of the current transformer CT2 to change the power flow in the power line 2 to the second connection location P2. The generated power is controlled under the condition that the power is not directed to the power system 1 side. As a result, the power corresponding to the power consumption of the first power consumption device 12 or the power less than or equal to the power consumption is supplied from the power generation device 11 to the power line 2. Usually, when the power consumption in the first power consumption device 12 exceeds the power generation power of the power generation device 11, the excess power is either or both of the discharge power of the charge / discharge device 10 and the power supplied from the power system 1. Is covered by

  As described above, the power generation device 11 refers to the first signal to determine the power flow in the power line 2 from the first connection point P1 based on whether the charging / discharging device 10 is in the charging mode or the discharging mode. The generated power is controlled under the condition that it does not go to the power system 1 side, or the power flow in the power line 2 is directed from the second connection point P2 to the power system 1 side with reference to the second signal. Voluntarily switches whether to control the generated power under the condition of no.

  As described above, when the charging / discharging device 10 is in the charging mode, the charging / discharging device 10 and the first power consuming device 12 that are connected to the power line 2 in the range downstream from the first connection point P1. Can be supplied with the power generated by the power generator 11. In addition, when the charging / discharging device 10 is in the discharge mode, the first power consuming device 12 connected to the power line 2 in the downstream side including the second connection point P2 is connected to the power generating device 11. Generated power can be supplied. Furthermore, since the charging / discharging device 10 is not connected to the power line 2 in the range downstream including the second connection point P2, even if the charging / discharging device 10 is in the discharge mode, the power generation device 11 is The power consumption of the first power consumption device 12 is grasped, and the operation is performed so as to output the generated power that covers the power consumption. Therefore, overloading of the power generation device 11 and the charge / discharge device 10 can be avoided while increasing the operating rate of the power generation device 11.

Second Embodiment
The distributed power supply system of the second embodiment is different from the distributed power supply system of the first embodiment in that a switching device 14 is provided. Although the distributed power supply system of 2nd Embodiment is demonstrated below, description is abbreviate | omitted about the structure similar to 1st Embodiment.

  FIG. 2 is a diagram illustrating the configuration of the distributed power supply system according to the second embodiment. As shown in the figure, the distributed power supply system of the second embodiment includes a switching device 14. The switching device 14 has a first signal line 4 to which a first signal representing a power flow from the first connection point P1 toward the power system 1 is input, and a second signal connection point P2 to the power system 1 side. The switch 14a to which the second signal line 5 to which the second signal representing the flow of the electric power flowing is input is connected, the first switching state in which the first signal line 4 is connected to the power generator 11, and the second signal line 5 And a switching control unit 14b for switching the switch 14a to any one of the second switching states in which the power generator 11 is connected. And the switching control part 14b receives the mode state signal which shows whether it is a discharge mode or a charge mode from the charging / discharging apparatus 10, and when the charging / discharging apparatus 10 is in a charging mode, it switches the switch 14a to the 1st. When the charging / discharging device 10 is in the discharge mode, the switch 14a is switched to the second switching state. The mode state signal is an HI signal and an LO signal as described in the first embodiment.

When the charging / discharging device 10 is in the discharge mode, an HI signal is transmitted from the charging / discharging device 10 to the switching control unit 14b, and the switching control unit 14b is in a second switching state in which the second signal line 5 is connected to the power generation device 11. To switch the switch 14a. As a result, the detection result of the current transformer CT2 is transmitted to the power generator 11, and the generated power is controlled under the condition that the power flow is not directed to the power system 1 side than the second connection point P2.
On the other hand, when the charging / discharging device 10 is in the charging mode, the LO signal is transmitted from the charging / discharging device 10 to the switching control unit 14b, and the switching control unit 14b connects the first signal line 4 to the power generation device 11. The switch 14a is switched to the first switching state. As a result, the detection result of the current transformer CT1 is transmitted to the power generator 11, and the generated power is controlled under the condition that the power flow is not directed to the power system 1 side from the first connection point P1.

  As described above, in the second embodiment, whether the switching device 14 transmits the first signal to the power generation device 11 based on whether the charging / discharging device 10 is in the charging mode or the discharging mode. Alternatively, it is switched whether the second signal is transmitted. That is, the power generation device 11 does not determine whether the charging / discharging device 10 is in the charging mode or the discharging mode, and when the charging / discharging device 10 is automatically in the charging mode, The generated power is controlled under the condition that the power flow is not directed toward the power system 1 from the first connection point P1, and when the charging / discharging device 10 is in the discharge mode, the power flow in the power line 2 is changed to the second connection point. It operates to control the generated power under the condition that it does not go from P2 to the power system 1 side.

<Third Embodiment>
The distributed power supply system according to the third embodiment is different from the first embodiment in that the detection result of the system information detection device 15 is also transmitted to the power generation device 11. Hereinafter, the distributed power supply system according to the third embodiment will be described, but the description of the same configuration as that of the first embodiment will be omitted.

FIG. 3 is a diagram illustrating the configuration of the distributed power supply system according to the third embodiment. As shown in the figure, the detection result of the system information detection device 15 that detects system information that can determine whether the power system 1 is in a power outage state or a non-power outage state is transmitted to the power generation device 11.
As explained in the first embodiment, when the charging / discharging device 10 is in the charging mode, the power generation device 11 causes the power flow in the power line 2 to flow from a predetermined location closer to the power system 1 than the first connection location P1. The condition that the generated power is controlled under the condition of not being directed to the 1 side, and the power flow in the power line 2 is not directed from the second connection point P2 to the power system 1 side when the charging / discharging device 10 is in the discharge mode. It is configured to control the generated power below. Charging / discharging device 10 operates in the discharge mode when it is determined that power system 1 is in a power failure state based on the system information received from system information detection device 15.

  That is, if the power system 1 is in a power failure state, the charging / discharging device 10 always operates in the discharge mode. Therefore, the power generation device 11 determines that the power system 1 is in a power failure state based on the system information received from the system information detection device 15. And when the power system 1 is in a power failure state, the power flow in the power line 2 is directed from the second connection point P2 to the power system 1 side. You may comprise so that generated electric power may be controlled on condition that there is no.

<Fourth embodiment>
The distributed power supply system of the fourth embodiment is different from the above embodiment in the connection location of the second power consuming device 13 with respect to the power line 2. The configuration of the distributed power supply system according to the fourth embodiment will be described below, but the description of the same configuration as the above embodiment will be omitted.

  FIG. 4 is a diagram illustrating the configuration of the distributed power supply system according to the fourth embodiment. As shown in FIG. 4, the fourth connection point P4 where the second power consuming device 13 is connected to the power line 2 is closer to the power system 1 than the second connection point P2 where the power generation device 11 is connected to the power line 2. In addition, the charging / discharging device 10 is located downstream of the first connection point P1 connected to the power line 2 (that is, the side away from the power system 1).

  Moreover, the 3rd power consuming apparatus 16 is connected to the 5th connection location of the electric power grid | system 1 side rather than the 1st connection location P1. Then, the power conversion unit 10a of the charging / discharging device 10 refers to the detection result of the system information detection device 15 when the power system 1 is in a non-power failure state (that is, the power supply from the power system 1 is normally performed). ), Referring to the detection result (fourth signal) of the current transformer CT4 provided on the power line 2 on the power system 1 side of the third power consuming device 16, the power system than the fourth connection point P4. The charge / discharge power is controlled under the condition that the power flow is not directed to the 1 side.

  Further, the second power consuming device 13 is connected to the fourth connection point P4 of the power line 2 via the circuit breaker 6. Then, like the circuit breaker 3, the circuit breaker 6 refers to the detection result of the system information detection device 15 and is closed when the power system 1 is in a non-power failure state. By electrically connecting the power line 2, power is supplied from the power line 2 to the second power consuming device 13. Moreover, the circuit breaker 6 refers to the detection result of the system information detection device 15 and opens the power system 1 if the power system 1 is in a power outage state to electrically disconnect the second power consuming device 13 and the power line 2. Thus, power is not supplied from the power line 2 to the second power consuming device 13.

With this configuration, when the power system 1 is in a non-power failure state, the charge / discharge device 10, the power generation device 11, the first power consumption device 12, and the second power consumption device 13 are electrically connected to each other via the power line 2. Therefore, the first power consuming device 12 can be supplied with power from at least one of the power system 1, the charging / discharging device 10, and the power generating device 11, and the second power consuming device 13 can be supplied with power. Thus, power can be supplied from at least one of the power system 1 and the charge / discharge device 10.
In addition, when the power system 1 is in a power failure state, the charging / discharging device 10, the power generation device 11, and the first power consumption device 12 are electrically connected to each other via the power line 2. In contrast, power can be supplied from at least one of the charging / discharging device 10 and the power generation device 11. In addition, even if it is necessary to supply power from the charging / discharging device 10 to the second power consuming device 13 when the power system 1 is in a non-power failure state, when the power system 1 is in a power failure state, The two power consuming devices 13 are electrically disconnected from the charging / discharging device 10 by the circuit breaker 6, and the power supply from the charging / discharging device 10 to the second power consuming device 13 becomes unnecessary. As a result, when the power system 1 is in a power failure state, the load on the charging / discharging device 10 can be reduced, and power is supplied from the charging / discharging device 10 to the first power consuming device 12 for a relatively long time. become able to.

<Fifth Embodiment>
In FIG. 1 of the first embodiment, a configuration in which the third connection point P3 between the power line 2 and the first power consuming device 12 is arranged on the downstream side of the second connection point P2 between the power line 2 and the power generation device 11 is used. Although described, it is equivalent even if the third connection point P3 is disposed between the second connection point P2 and the current transformer CT2.

FIG. 6 is a modification of FIG. 1 and is a diagram for explaining the configuration of the distributed power supply system of the fifth embodiment. As shown in FIG. 6, the distributed power supply system includes a power line 2 connected to the power system 1, a charging / discharging device 10 having a power storage unit 10 b connected to the power line 2 at a first connection location P <b> 1, and a power line 2 is connected to the power line 2 at the second connection point P2 and the first power consuming device 12 is connected to the power line 2 at the third connection point P3. A first connection point P1, a third connection point P3, and a second connection point P2 are provided in the arrangement order toward the downstream side as viewed from the point. Furthermore, the second power consuming device 13 is connected to the power line 2 at the fourth connection point P4 closer to the power system 1 than the first connection point P1. In the present embodiment, the side closer to the power system 1 in the power line 2 is referred to as the upstream side, and the side away from the power system 1 in the power line 2 is referred to as the downstream side.

In this embodiment, the circuit breaker 3 is provided in the power line 2 on the power system 1 side from the first connection point P1. Moreover, the system information detection apparatus 15 which detects the system information which can determine whether the electric power system 1 is in the power failure state or the non-power failure state is provided on the power system 1 side from the circuit breaker 3. For example, the system information detection device 15 is a device that detects the voltage of power on the power line 2 as system information. In this case, if the voltage of the power line 2 on the power system 1 side of the circuit breaker 3 is less than a predetermined voltage, it can be determined that the power system 1 is in a power failure state, and if the voltage is higher than the predetermined voltage, the power system 1 is in a non-power failure state. Can be determined.

The circuit breaker 3 refers to the detection result of the system information detection device 15, and if the power system 1 is in a non-power failure state, the circuit breaker 3 is closed to electrically connect the power system 1 and the first connection location P1. Thus, the power supplied from the power system 1 is supplied to the downstream side of the first connection point P1. Moreover, the circuit breaker 3 refers to the detection result of the system information detection device 15, and if the power system 1 is in a power failure state, the circuit breaker 3 is opened to electrically disconnect the power system 1 and the first connection location P1. .

The charging / discharging device 10 includes a power storage unit 10b capable of storing electricity, and a power conversion unit 10a capable of controlling discharge power from the power storage unit 10b to the power line 2 and charge power from the power line 2 to the power storage unit 10b. . The power storage unit 10b can be composed of various devices having a power storage function, such as a storage battery or an electric double layer capacitor. Moreover, the detection result of the system | strain information detection apparatus 15 is comprised so that it may be transmitted to the charging / discharging apparatus 10. FIG.

In the present embodiment, the first signal to the third signal, which are detection results of the current transformers CT1 to CT3, are current values in the power line 2. As a result, the power in the power line 2 can be derived from the detection results of the current transformers CT1 to CT3 and the voltage value of the power line 2 detected separately. Specifically, the power generation device 11 knows the power flow from the first connection point P1 toward the power system 1 from the first signal that is the detection result of the current transformer CT1 and the voltage value of the power of the power line 2. In addition, the power flow from the third connection point P3 toward the power system 1 can be known from the second signal that is the detection result of the current transformer CT2 and the voltage value of the power of the power line 2. Similarly, the charging / discharging device 10 knows the power flow from the fourth connection point P4 toward the power system 1 from the third signal, which is the detection result of the current transformer CT3, and the voltage value of the power of the power line 2. Can do.

The power conversion unit 10a of the charging / discharging device 10 refers to the detection result of the system information detection device 15 when the power system 1 is in a non-power failure state (that is, the power supply from the power system 1 is normally performed). ) With reference to the detection result of the current transformer CT3 provided on the power line 2 on the power system 1 side with respect to the second power consuming device 13, the power line 2 on the power system 1 side with respect to the fourth connection point P4. Charge / discharge power is controlled under the condition that the power flow is not directed. That is, when the power conversion unit 10a of the charging / discharging device 10 operates in the discharge mode, the maximum discharge is performed under the condition that the power flow in the power line 2 is not directed to the power system 1 side than the fourth connection point P4. Electric power is supplied to the power line 2.

Based on the system information transmitted from the system information detection device 15, the charging / discharging device 10 can determine whether the power system 1 is in a non-power failure state or a power failure state. And the charging / discharging apparatus 10 discharges with respect to the power line 2 the charge mode which can charge the electrical storage part 10b with the electric power from the power line 2, and the electric power stored in the electrical storage part 10b, when the electric power grid | system 1 is a non-power failure state. Operate in any of the possible discharge modes. The charging / discharging device 10 may stand by without performing a charging operation even in the charging mode, or may be waiting without performing a discharging operation even in the discharging mode (standby state). .
On the other hand, the charging / discharging device 10 always operates in the discharge mode when the power system 1 is in a power failure state (that is, when the power supply from the power system 1 is not normally performed).

The charging / discharging device 10 transmits a mode state signal indicating whether the charging mode is the discharging mode or the charging mode to the power generation device 11. In the present embodiment, the mode state signal only needs to be able to distinguish between the two states of the charge mode and the discharge mode. Therefore, the mode state signal is a combination of the HI (high) signal and the LO (low) signal having different voltage values. Can be configured. The charging / discharging device 10 may output, for example, an HI signal when in the discharging mode, and an LO signal when in the charging mode. Further, the power generation device 11 voluntarily determines whether the charge / discharge device 10 is in the discharge mode or the charge mode based on the mode state signal (HI signal and LO signal) transmitted from the charge / discharge device 10. To do.

Since the circuit breaker 3 is closed when the power system 1 is in an uninterrupted state, the charging / discharging device 10, the power generation device 11, the first power consumption device 12, and the second power consumption device 13 are mutually connected via the power line 2. Electrically connected. At this time, power is supplied from at least one of the power system 1, the charge / discharge device 10, and the power generation device 11 to the first power consumption device 12, and power is supplied to the second power consumption device 13. Power is supplied from at least one of the system 1 and the charge / discharge device 10.
On the other hand, since the circuit breaker 3 opens when the power system 1 is in a power failure state, the charge / discharge device 10, the power generation device 11, and the first power consumption device 12 are electrically connected to each other via the power line 2. In addition, the second power consuming device 13 is electrically disconnected from the charge / discharge device 10, the power generation device 11, and the first power consuming device 12. At this time, power is supplied from at least one of the charging / discharging device 10 and the power generation device 11 to the first power consumption device 12, but no power is supplied to the second power consumption device 13. .

The first power consuming device 12 is an important electrical device that needs to supply power even when the power system 1 is in a power failure state. For example, a lighting device that needs to be lit in an emergency such as a power outage or an information device that needs to be constantly operated is connected to the third connection point P3 of the power line 2 as the first power consuming device 12. . On the other hand, the second power consuming device 13 is an electrical device that is not supplied with power if the power system 1 is in a power failure state. For example, an electric device that is less important than the first power consuming device 12 such as an air conditioner that does not have to be supplied with power in an emergency such as a power outage or a lighting device that is not so important is the second power. The consumer device 13 is connected to the fourth connection point P4 of the power line 2.
In addition, it can be set suitably what kind of electric equipment is made into the 1st power consuming apparatus 12 and the 2nd power consuming apparatus 13. FIG.

The power generation device 11 can be configured using a device capable of controlling its own generated power, such as a fuel cell or a generator that operates by the driving force of the engine. The power generation device 11 is such that when the charging / discharging device 10 is in the charging mode, the power flow in the power line 2 is not directed from the predetermined location on the power system 1 side to the power system 1 side than the first connection location P1. The generated power is controlled below (that is, the maximum generated power is supplied to the power line 2 under the conditions), and when the charging / discharging device 10 is in the discharge mode, the power flow in the power line 2 is changed from the third connection point P3. The generated power is controlled under the condition that it does not go to the power system 1 side (that is, the maximum generated power is supplied to the power line 2 under that condition).

Specifically, when the charging / discharging device 10 is in the charging mode, the power generation device 11 refers to the detection result (first signal) of the current transformer CT1 to change the power flow in the power line 2 to the first connection location P1. The generated power is controlled under the condition that it is not directed from the predetermined location on the power system 1 side to the power system 1 side. As a result, the power corresponding to the total power of the charging power of the charging / discharging device 10 and the power consumption of the first power consuming device 12 or the power equal to or lower than the total power is supplied from the power generator 11 to the power line 2.

On the other hand, when the charging / discharging device 10 is in the discharge mode, the power generation device 11 refers to the detection result (second signal) of the current transformer CT2 to change the power flow in the power line 2 to the third connection point P3. The generated power is controlled under the condition that the power is not directed to the power system 1 side. As a result, the power corresponding to the power consumption of the first power consumption device 12 or the power less than or equal to the power consumption is supplied from the power generation device 11 to the power line 2. Usually, when the power consumption in the first power consumption device 12 exceeds the power generation power of the power generation device 11, the excess power is either or both of the discharge power of the charge / discharge device 10 and the power supplied from the power system 1. Is covered by

As described above, the power generation device 11 refers to the first signal to determine the power flow in the power line 2 from the first connection point P1 based on whether the charging / discharging device 10 is in the charging mode or the discharging mode. The generated power is controlled under the condition that it does not go to the power system 1 side, or the power flow in the power line 2 is directed from the third connection point P3 to the power system 1 side with reference to the second signal. Voluntarily switches whether to control the generated power under the condition of no.

As described above, when the charging / discharging device 10 is in the charging mode, the charging / discharging device 10 and the first power consuming device 12 that are connected to the power line 2 in the range downstream from the first connection point P1. Can be supplied with the power generated by the power generator 11. In addition, when the charging / discharging device 10 is in the discharge mode, the first power consuming device 12 connected to the power line 2 in the downstream side including the third connection point P3 is connected to the power generating device 11. Generated power can be supplied. Furthermore, since the charging / discharging device 10 is not connected to the power line 2 in the downstream side including the third connection point P3, even if the charging / discharging device 10 is in the discharge mode, the power generation device 11 is The power consumption of the first power consumption device 12 is grasped, and the operation is performed so as to output the generated power that covers the power consumption. Therefore, overloading of the power generation device 11 and the charge / discharge device 10 can be avoided while increasing the operating rate of the power generation device 11.

<Sixth Embodiment>
In FIG. 2 of the second embodiment, a configuration in which the third connection point P3 between the power line 2 and the first power consuming device 12 is arranged downstream of the second connection point P2 between the power line 2 and the power generation device 11 is used. Although described, it is equivalent even if the third connection point P3 is disposed between the second connection point P2 and the current transformer CT2.

FIG. 7 is a modification of FIG. 2 and is a diagram for explaining the configuration of the distributed power supply system of the sixth embodiment. As shown in the figure, the distributed power supply system of the sixth embodiment includes a switching device 14. The switching device 14 has a first signal line 4 to which a first signal representing a power flow from the first connection point P1 toward the power system 1 is input, and a third signal connection point P3 to the power system 1 side. The switch 14a to which the second signal line 5 to which the second signal representing the flow of the electric power flowing is input is connected, the first switching state in which the first signal line 4 is connected to the power generator 11, and the second signal line 5 And a switching control unit 14b for switching the switch 14a to any one of the second switching states in which the power generator 11 is connected. And the switching control part 14b receives the mode state signal which shows whether it is a discharge mode or a charge mode from the charging / discharging apparatus 10, and when the charging / discharging apparatus 10 is in a charging mode, it switches the switch 14a to the 1st. When the charging / discharging device 10 is in the discharge mode, the switch 14a is switched to the second switching state. The mode state signal is an HI signal and an LO signal as described in the first embodiment.

When the charging / discharging device 10 is in the discharge mode, an HI signal is transmitted from the charging / discharging device 10 to the switching control unit 14b, and the switching control unit 14b is in a second switching state in which the second signal line 5 is connected to the power generation device 11. To switch the switch 14a. As a result, the detection result of the current transformer CT2 is transmitted to the power generator 11, and the generated power is controlled under the condition that the power flow is not directed to the power system 1 side from the third connection point P3.
On the other hand, when the charging / discharging device 10 is in the charging mode, the LO signal is transmitted from the charging / discharging device 10 to the switching control unit 14b, and the switching control unit 14b connects the first signal line 4 to the power generation device 11. The switch 14a is switched to the first switching state. As a result, the detection result of the current transformer CT1 is transmitted to the power generator 11, and the generated power is controlled under the condition that the power flow is not directed to the power system 1 side from the first connection point P1.

As described above, in the sixth embodiment, whether the switching device 14 transmits the first signal to the power generation device 11 based on whether the charging / discharging device 10 is in the charging mode or the discharging mode. Alternatively, it is switched whether the second signal is transmitted. That is, the power generation device 11 does not determine whether the charging / discharging device 10 is in the charging mode or the discharging mode, and when the charging / discharging device 10 is automatically in the charging mode, The generated power is controlled under the condition that the power flow is not directed toward the power system 1 from the first connection point P1, and when the charging / discharging device 10 is in the discharge mode, the power flow in the power line 2 is changed to the third connection point. It operates to control the generated power under the condition that it does not go from P3 to the power system 1 side.

<Seventh embodiment>
In FIG. 3 of the third embodiment, a configuration in which the third connection point P3 between the power line 2 and the first power consuming device 12 is arranged downstream of the second connection point P2 between the power line 2 and the power generation device 11 is used. Although described, it is equivalent even if the third connection point P3 is disposed between the second connection point P2 and the current transformer CT2.

FIG. 8 is a modification of FIG. 3 and is a diagram for explaining the configuration of the distributed power supply system of the seventh embodiment. As shown in the figure, the detection result of the system information detection device 15 that detects system information that can determine whether the power system 1 is in a power outage state or a non-power outage state is transmitted to the power generation device 11.
As explained in the first embodiment, when the charging / discharging device 10 is in the charging mode, the power generation device 11 causes the power flow in the power line 2 to flow from a predetermined location closer to the power system 1 than the first connection location P1. The condition that the generated power is controlled under the condition of not being directed to the first side, and the power flow in the power line 2 is not directed from the third connection point P3 to the power system 1 side when the charging / discharging device 10 is in the discharge mode. It is configured to control the generated power below. Charging / discharging device 10 operates in the discharge mode when it is determined that power system 1 is in a power failure state based on the system information received from system information detection device 15.

That is, if the power system 1 is in a power failure state, the charging / discharging device 10 always operates in the discharge mode. Therefore, the power generation device 11 determines that the power system 1 is in a power failure state based on the system information received from the system information detection device 15. And when the power system 1 is in a power failure state, the power flow in the power line 2 is directed from the third connection point P3 to the power system 1 side. You may comprise so that generated electric power may be controlled on condition that there is no.

<Eighth Embodiment>
In FIG. 4 of the fourth embodiment, a configuration in which the third connection point P3 between the power line 2 and the first power consuming device 12 is arranged on the downstream side of the second connection point P2 between the power line 2 and the power generation device 11 is used. Although described, it is equivalent even if the third connection point P3 is disposed between the second connection point P2 and the current transformer CT2.

FIG. 9 is a modification of FIG. 4 and is a diagram for explaining the configuration of the distributed power supply system of the eighth embodiment. As shown in FIG. 9, the fourth connection location P4 where the second power consuming device 13 is connected to the power line 2 is the third connection location P3 where the first power consuming device 12 is connected to the power line 2 and the power generation device 11. The second connection point P2 connected to the power line 2 is closer to the power system 1 and the downstream side than the first connection point P1 where the charging / discharging device 10 is connected to the power line 2 (that is, from the power system 1). Located on the far side).

Moreover, the 3rd power consuming apparatus 16 is connected to the 5th connection location of the electric power grid | system 1 side rather than the 1st connection location P1. Then, the power conversion unit 10a of the charging / discharging device 10 refers to the detection result of the system information detection device 15 when the power system 1 is in a non-power failure state (that is, the power supply from the power system 1 is normally performed). ), Referring to the detection result (fourth signal) of the current transformer CT4 provided on the power line 2 on the power system 1 side of the third power consuming device 16, the power system than the fourth connection point P4. The charge / discharge power is controlled under the condition that the power flow is not directed to the 1 side.

Further, the second power consuming device 13 is connected to the fourth connection point P4 of the power line 2 via the circuit breaker 6. Then, like the circuit breaker 3, the circuit breaker 6 refers to the detection result of the system information detection device 15 and is closed when the power system 1 is in a non-power failure state. By electrically connecting the power line 2, power is supplied from the power line 2 to the second power consuming device 13. Moreover, the circuit breaker 6 refers to the detection result of the system information detection device 15 and opens the power system 1 if the power system 1 is in a power outage state to electrically disconnect the second power consuming device 13 and the power line 2. Thus, power is not supplied from the power line 2 to the second power consuming device 13.

With this configuration, when the power system 1 is in a non-power failure state, the charge / discharge device 10, the power generation device 11, the first power consumption device 12, and the second power consumption device 13 are electrically connected to each other via the power line 2. Therefore, the first power consuming device 12 can be supplied with power from at least one of the power system 1, the charging / discharging device 10, and the power generating device 11, and the second power consuming device 13 can be supplied with power. Thus, power can be supplied from at least one of the power system 1 and the charge / discharge device 10.
In addition, when the power system 1 is in a power failure state, the charging / discharging device 10, the power generation device 11, and the first power consumption device 12 are electrically connected to each other via the power line 2. In contrast, power can be supplied from at least one of the charging / discharging device 10 and the power generation device 11. In addition, even if it is necessary to supply power from the charging / discharging device 10 to the second power consuming device 13 when the power system 1 is in a non-power failure state, when the power system 1 is in a power failure state, The two power consuming devices 13 are electrically disconnected from the charging / discharging device 10 by the circuit breaker 6, and the power supply from the charging / discharging device 10 to the second power consuming device 13 becomes unnecessary. As a result, when the power system 1 is in a power failure state, the load on the charging / discharging device 10 can be reduced, and power is supplied from the charging / discharging device 10 to the first power consuming device 12 for a relatively long time. become able to.

<Another embodiment>
<1>
In the above embodiment, several configurations of the distributed power supply system are illustrated, but the configuration may be further changed. For example, the configuration may be changed to a configuration in which another power consuming device is additionally provided or a configuration in which the second power consuming device 13 is not provided.

<2>
In the above embodiment, the system information detection apparatus 15 is an apparatus that detects the voltage of power on the power line 2 as system information. However, the system information detection apparatus 15 having another configuration can also be used. For example, a device that detects the zero-cross point of the AC voltage of the power system 1 as system information can be used as the system information detection device 15. For example, when the frequency of the AC voltage is 60 Hz, the zero cross point is detected every half cycle of the AC voltage, that is, about every 8 msec. Therefore, after the zero cross point is detected, the grid information detection device 15 determines that the power system 1 is in a power failure state when the next zero cross point cannot be detected even after elapse of 9 msec, for example. To communicate. In addition, after the zero cross point is detected, for example, when the next zero cross point can be detected before 9 msec has elapsed, the grid information detection device 15 determines that the power grid 1 is in a non-power failure state, and the determination result is You may transmit to each apparatus.

<3>
In the said embodiment, you may comprise so that the system | strain information detection apparatus 15 may detect system | strain information in the upstream (the electric power system 1 side) immediately upstream of the circuit breaker 3. FIG. The charge / discharge device 10 may include a circuit breaker 3 or a system information detection device 15 provided immediately upstream of the circuit breaker 3 (on the power system 1 side).

<4>
In the above-described embodiment, natural energy such as a photovoltaic power generator is connected to the power line 2 closer to the power system 1 than the detection position of the current transformer CT1 of the distributed power supply system shown in FIGS . 1 to 4 and 6 to 9. A power generation device may be connected. In this case, if the power generation device 11 covers as much as possible the power consumption on the downstream side (side away from the power system 1) from the detection position of the current transformer CT1, that is, the power consumption on the downstream side of the natural energy power generation device. The surplus of the power generated by the natural energy power generation device increases. As a result, the electric power that can be sold from the natural energy power generation apparatus to the electric power system 1 can be increased.

< 5 >
4 and 9 of the above embodiment, the fourth connection point P4 between the power line 2 and the second power consuming device 13 is arranged on the downstream side of the first connection point P1 between the power line 2 and the charge / discharge device 10. Although the configuration is described, it is equivalent even if the fourth connection point P4 is arranged between the current transformer CT1 and the first connection point P1. Furthermore, if the fourth connection point P4 is disposed between the current transformer CT1 and the circuit breaker 3 (that is, the power system 1 side with respect to the circuit breaker 3), the second power consuming device 13 and the power line 2 are connected. The circuit breaker 6 provided therebetween may be omitted. This is because when the circuit breaker 3 is opened when the power system 1 is in a power failure state, the second power consuming device 13 is electrically connected to the charging / discharging device 10 and the power generation device 11 regardless of the switching operation of the circuit breaker 6. This is because the purpose of providing the circuit breaker 6 is achieved.

< 6 >
In the above embodiment, the charging / discharging device 10 transmits the signal indicating whether the mode is the “discharge mode” or the “charge mode”, but the mode state signal is “discharge mode”. Or “other than the discharge mode (that is, the charging mode and the standby state (the state in which neither the charging operation nor the discharging operation is performed))” may be transmitted. In this case, when the charging / discharging device 10 is in the “discharge mode”, the power generation device 11 controls the generated power under the condition that the power flow in the power line 2 is not directed from the second connection point P2 to the power system 1 side. (I.e., the maximum generated power is supplied to the power line 2 under the conditions), and when the charging / discharging device 10 is in a “non-discharge mode”, the power flow in the power line 2 is more than the first connection point P1 in the power system. What is necessary is just to comprise so that generated electric power may be controlled on the conditions that it does not go to 1 side (namely, the largest generated electric power is supplied to the power line 2 on the conditions).

  INDUSTRIAL APPLICABILITY The present invention can be used in a distributed power supply system that can avoid overloading of a power generation device and a charge / discharge device while increasing the operating rate of the power generation device.

DESCRIPTION OF SYMBOLS 1 Power system 2 Power line 4 1st signal line 5 2nd signal line 10 Charging / discharging apparatus 10b Power storage part 11 Power generation apparatus 12 1st power consumption apparatus 13 2nd power consumption apparatus 14 Switching apparatus 14a Switching device 14b Switching control part 15 System information Detection device P1 1st connection location P2 2nd connection location P3 3rd connection location

Claims (8)

A power line connected to a power system, a charge / discharge device having a power storage unit connected to the power line at a first connection location, a power generation device connected to the power line at a second connection location, and the power line A first power consuming device connected at a third connection location with respect to the power line, toward the downstream side when viewed from the connection location of the power system to the power line, and the second connection location and the A distributed power supply system in which the third connection points are provided in the arrangement order;
The charge / discharge device operates by switching between a discharge mode capable of discharging the power stored in the power storage unit to the power line and a charge mode capable of charging power from the power line to the power storage unit,
The power generator is configured such that when the charge / discharge device is in the charge mode, the power flow in the power line is not directed from the predetermined location on the power system side to the power system side than the first connection location. The generated power is controlled by the control unit, and when the charging / discharging device is in the discharge mode, the generated power is controlled under the condition that the power flow in the power line is not directed from the second connection point to the power system side. Configured ,
The charging / discharging device transmits a mode state signal indicating whether the discharging mode or the charging mode is to the power generation device,
The power generation device receives a first signal representing a power flow from the first connection location toward the power system and a second signal representing a power flow from the second connection location toward the power system, When it is determined that the charging / discharging device is in the charging mode based on the mode state signal received from the charging / discharging device, the generated power is controlled with reference to the first signal and determined to be in the discharging mode. A distributed power supply system that controls generated power with reference to the second signal. A power line connected to a power system, a charge / discharge device having a power storage unit connected to the power line at a first connection location, a power generation device connected to the power line at a second connection location, and the power line A first power consuming device connected at a third connection location with respect to the power line, toward the downstream side when viewed from the connection location of the power system to the power line, and the second connection location and the A distributed power supply system in which the third connection points are provided in the arrangement order;
The charge / discharge device operates by switching between a discharge mode capable of discharging the power stored in the power storage unit to the power line and a charge mode capable of charging power from the power line to the power storage unit,
The power generator is configured such that when the charge / discharge device is in the charge mode, the power flow in the power line is not directed from the predetermined location on the power system side to the power system side than the first connection location. The generated power is controlled by the control unit, and when the charging / discharging device is in the discharge mode, the generated power is controlled under the condition that the power flow in the power line is not directed from the second connection point to the power system side. Configured,
A first signal line to which a first signal representing a power flow from the first connection point toward the power system side is input, and a second signal representing a power flow from the second connection point toward the power system side. A switch to which a second signal line to which a signal is input is connected; a first switching state in which the first signal line is connected to the power generator; and a second switch in which the second signal line is connected to the power generator. A switching device having a switching control unit that switches the switch to any of the states,
The switching control unit receives a mode state signal indicating whether the charging mode is the discharging mode or the charging mode from the charging / discharging device, and when the charging / discharging device is in the charging mode, A distributed power supply system that switches to the first switching state and switches the switch to the second switching state when the charging / discharging device is in the discharge mode. A system information detection device that detects system information capable of determining whether the power system is in a power outage state or a non-power outage state,
The charging / discharging device is configured to operate in the discharge mode when it is determined that the power system is in a power failure state based on the system information received from the system information detection device,
The power generation device determines that the charge / discharge device is in the discharge mode when it is determined that the power system is in a power failure state based on the system information received from the system information detection device. The distributed power system described. A second power consuming device connected to the power line at a fourth connection location provided on the power system side than the second connection location,
Based on the grid information received from the grid information detection apparatus, the power generation device directs the power flow in the power line to the power grid side from the second connection location when the power grid is in a power failure state. The generated power is controlled under the condition that the power system is not switched, and when the power system is in an uninterruptible state, the power flow in the power line is more on the power system side than the predetermined place on the power system side than the fourth connection place. Configured to control the generated power under the condition that
When the power system is in a power failure state, the charge / discharge device, the power generation device, and the first power consumption device are electrically connected to each other via the power line, and the second power consumption device is Electrically disconnected from the discharge device, the power generation device and the first power consuming device;
The charge / discharge device, the power generation device, the first power consumption device, and the second power consumption device are electrically connected to each other via the power line when the power system is in a non-power failure state. Distributed power supply system described in 1. A power line connected to a power system, a charge / discharge device having a power storage unit connected to the power line at a first connection location, a power generation device connected to the power line at a second connection location, and the power line A first power consuming device connected at a third connection location with respect to the power line, toward the downstream side as viewed from the connection location of the power system with respect to the power line, and the third connection location and the A distributed power supply system in which the second connection points are provided in the order of arrangement,
The charge / discharge device operates by switching between a discharge mode capable of discharging the power stored in the power storage unit to the power line and a charge mode capable of charging power from the power line to the power storage unit,
The power generator is configured such that when the charge / discharge device is in the charge mode, the power flow in the power line is not directed from the predetermined location on the power system side to the power system side than the first connection location. The generated power is controlled by the control unit, and when the charging / discharging device is in the discharge mode, the generated power is controlled under the condition that the power flow in the power line is not directed from the third connection point to the power system side. Configured,
The charging / discharging device transmits a mode state signal indicating whether the discharging mode or the charging mode is to the power generation device,
The power generation device receives a first signal representing a power flow from the first connection location toward the power system and a second signal representing a power flow from the third connection location toward the power system, When it is determined that the charging / discharging device is in the charging mode based on the mode state signal received from the charging / discharging device, the generated power is controlled with reference to the first signal and determined to be in the discharging mode. A distributed power supply system that controls generated power with reference to the second signal. A power line connected to a power system, a charge / discharge device having a power storage unit connected to the power line at a first connection location, a power generation device connected to the power line at a second connection location, and the power line A first power consuming device connected at a third connection location with respect to the power line, toward the downstream side as viewed from the connection location of the power system with respect to the power line, and the third connection location and the A distributed power supply system in which the second connection points are provided in the order of arrangement,
The charge / discharge device operates by switching between a discharge mode capable of discharging the power stored in the power storage unit to the power line and a charge mode capable of charging power from the power line to the power storage unit,
The power generator is configured such that when the charge / discharge device is in the charge mode, the power flow in the power line is not directed from the predetermined location on the power system side to the power system side than the first connection location. The generated power is controlled by the control unit, and when the charging / discharging device is in the discharge mode, the generated power is controlled under the condition that the power flow in the power line is not directed from the third connection point to the power system side. Configured,
A first signal line to which a first signal representing a power flow from the first connection point toward the power system side is input, and a second signal representing a power flow from the third connection point toward the power system side. A switch to which a second signal line to which a signal is input is connected; a first switching state in which the first signal line is connected to the power generator; and a second switch in which the second signal line is connected to the power generator. A switching device having a switching control unit that switches the switch to any of the states,
The switching control unit receives a mode state signal indicating whether the charging mode is the discharging mode or the charging mode from the charging / discharging device, and when the charging / discharging device is in the charging mode, A distributed power supply system that switches to the first switching state and switches the switch to the second switching state when the charging / discharging device is in the discharge mode. A system information detection device that detects system information capable of determining whether the power system is in a power outage state or a non-power outage state,
The charging / discharging device is configured to operate in the discharge mode when it is determined that the power system is in a power failure state based on the system information received from the system information detection device,
The power generation device determines that the charge / discharge device is in the discharge mode when it is determined that the power system is in a power failure state based on the system information received from the system information detection device. The distributed power system described. A second power consuming device connected to the power line at a fourth connection location provided on the power system side than the third connection location,
Based on the grid information received from the grid information detection apparatus, the power generation device directs the power flow in the power line to the power grid side from the third connection location when the power grid is in a power failure state. The generated power is controlled under the condition that the power system is not switched, and when the power system is in an uninterruptible state, the power flow in the power line is more on the power system side than the predetermined place on the power system side than the fourth connection place. Configured to control the generated power under the condition that
When the power system is in a power failure state, the charge / discharge device, the power generation device, and the first power consumption device are electrically connected to each other via the power line, and the second power consumption device is Electrically disconnected from the discharge device, the power generation device and the first power consuming device;
The said charging / discharging apparatus, the said electric power generating apparatus, the said 1st power consumption apparatus, and the said 2nd power consumption apparatus are mutually electrically connected through the said power line when the said electric power grid | system is in a non-power-out state. Distributed power supply system described in 1.

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